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We at Thogus find plastic injection molding fascinating and while we recognize that this might not be the case for most, we do think the facts below are pretty interesting. Enjoy!

The first plastic injection molding machine was patented in the United States in 1872 by John Wesley Hyatt, with help from his brother.

The original purpose for the injection molding machine was to make billiard balls by injection celluloid into a mold. Celluloid went on to replace ivory in billiard ball production.

In 1946 the Injection Molding industry was revolutionized by American James Hendry when he updated Hyatt’s design from a plunger to a screw injection molding. To this day most plastic injection molding machines use this technique.

In the 1970s James Hendry also designed the first gas-assisted injection molding process, allowing for more complex parts to be made.